Method and apparatus for dynamically de-activating secondary cell group of dual connectivity

Abstract

A method for dynamically de-activating a secondary cell group (SCG) of dual connectivity includes: checking if at least one radio frequency (RF) band used by the SCG meets a pre-defined criterion, and in response to the at least one RF band meeting the pre-defined criterion, de-activating the SCG. For example, the at least one RF band is a 5G New Radio (NR) band.

What is claimed is: 
     
         1 . A method for dynamically de-activating a secondary cell group (SCG) of dual connectivity, comprising:
 checking if at least one radio frequency (RF) band used by the SCG meets a pre-defined criterion; and   in response to the at least one RF band meeting the pre-defined criterion, de-activating the SCG.   
     
     
         2 . The method of  claim 1 , wherein the at least one RF band is a 5G New Radio (NR) band. 
     
     
         3 . The method of  claim 1 , wherein checking if the at least one RF band used by the SCG meets the pre-defined criterion comprises:
 in response to receiving a power saving event, checking if the at least one RF band meets the pre-defined criterion.   
     
     
         4 . The method of  claim 1 , wherein checking if the at least one RF band used by the SCG meets the pre-defined criterion comprises:
 checking a band number of the at least one RF band.   
     
     
         5 . The method of  claim 1 , wherein checking if the at least one RF band used by the SCG meets the pre-defined criterion comprises:
 checking a frequency of the at least one RF band.   
     
     
         6 . The method of  claim 5 , wherein checking if the at least one RF band used by the SCG meets the pre-defined criterion further comprises:
 checking a bandwidth of the at least one RF band.   
     
     
         7 . The method of  claim 1 , wherein checking if the at least one RF band used by the SCG meets the pre-defined criterion further comprises:
 checking a bandwidth of the at least one RF band.   
     
     
         8 . The method of  claim 1 , wherein de-activating the SCG comprises:
 creating a fake measurement result; and   performing an SCG failure information procedure to inform a network of the fake measurement result.   
     
     
         9 . The method of  claim 1 , further comprising:
 in response to the at least one RF band meeting the pre-defined criterion, stopping sending measurement reports to a network.   
     
     
         10 . The method of  claim 9 , further comprising:
 in response to the at least one RF band meeting the pre-defined criterion, keeping performing measurements for measurement objects that are alive.   
     
     
         11 . A wireless communication apparatus comprising:
 a transceiver circuit, arranged to transmit and receive wireless signals; and   a control circuit, coupled to the transceiver circuit and arranged to:
 check if at least one radio frequency (RF) band used by a secondary cell group (SCG) of dual connectivity meets a pre-defined criterion; and 
 de-activate the SCG when the at least one RF band meets the pre-defined criterion. 
   
     
     
         12 . The wireless communication apparatus of  claim 11 , wherein the at least one RF band is a 5G New Radio (NR) band. 
     
     
         13 . The wireless communication apparatus of  claim 11 , wherein the control circuit is arranged to check if the at least one RF band meets the pre-defined criterion when receiving a power saving event. 
     
     
         14 . The wireless communication apparatus of  claim 11 , wherein the control circuit is arranged to check a band number of the at least one RF band, to determine if the at least one RF band meets the pre-defined criterion. 
     
     
         15 . The wireless communication apparatus of  claim 11 , wherein the control circuit is arranged to check a frequency of the at least one RF band, to determine if the at least one RF band meets the pre-defined criterion. 
     
     
         16 . The wireless communication apparatus of  claim 15 , wherein the control circuit is further arranged to check a frequency of the at least one RF band, to determine if the at least one RF band meets the pre-defined criterion. 
     
     
         17 . The wireless communication apparatus of  claim 11 , wherein the control circuit is arranged to check a bandwidth of the at least one RF band, to determine if the at least one RF band meets the pre-defined criterion. 
     
     
         18 . The wireless communication apparatus of  claim 11 , wherein the control circuit is arranged to de-activate the SCG by:
 creating a fake measurement result; and   performing an SCG failure information procedure to inform a network of the fake measurement result.   
     
     
         19 . The wireless communication apparatus of  claim 11 , wherein the control circuit is further arranged to stop sending measurement reports to a network, when the at least one RF band meets the pre-defined criterion. 
     
     
         20 . The wireless communication apparatus of  claim 19 , wherein the control circuit is further arranged to keep performing measurements for measurement objects that are alive, when the at least one RF band meets the pre-defined criterion.